When using cached entities along with optimistic locking using the @Version annotation and lazy loading a TransientObjectException may be thrown during flushing.
A test case is attached.
Entities:
{code:java}@NamedQueries({
@NamedQuery(
name = "Domain.selectAll",
query = "SELECT DISTINCT d" +
" FROM Domain d" +
" LEFT JOIN FETCH d.servers s")
})
@Entity
public class Domain {
@Id
@GeneratedValue
private Long id;
@ManyToOne
private Privilege privilege;
@Version
private Integer rowVersion;
@OneToMany(mappedBy = "domain")
private Set<Server> servers;
}{code}
{code:java}@Entity
public class Privilege {
@Id
@GeneratedValue
private Long id;
@ManyToOne(fetch = FetchType.LAZY)
private Domain domain;
@ManyToOne(fetch = FetchType.LAZY)
private Server server;
@Version
private Integer rowVersion;
}{code}
{ noformat code:java }@Entity
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Server {
@Id
@GeneratedValue
private Long id;
@ManyToOne
private Domain domain;
@ManyToOne
private Privilege privilege;
@Version
private Integer rowVersion;
}{ noformat code }
Code:
{code:java}@Test
public void hhh123Test() throws Exception {
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
// Load all domains - a TransientObjectException is thrown
List<Domain> domains =
entityManager.createNamedQuery("Domain.selectAll", Domain.class)
.getResultList();
entityManager.getTransaction().commit();
entityManager.close();
}{code} |
|
